JP3063492B2 - Washing machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to stop the operation when the washing tub lid is opened during dehydration or when imbalance is abnormal.
The present invention relates to a washing machine for ensuring safety.

[0002]

2. Description of the Related Art In recent years, as safety measures for electrical appliances have advanced,
Washing machines are also required to further improve safety.

Conventionally, this type of washing machine has been configured as shown in FIGS. Hereinafter, the configuration will be described.

As shown in FIG. 1, a washing / dewatering tub 1 has a stirring blade 2 rotatably provided at the bottom thereof, and reduces the driving force from a motor 4 via a speed reduction mechanism 3.
The driving force is transmitted to the washing and dewatering tub 1 during dehydration. The switching between the dehydration and the washing at this time is performed by driving the drain valve 5. When the drain valve 5 is driven, the washing water is drained and the clutch of the speed reduction mechanism 3 is switched to perform the dehydration operation.

The washing tub lid 6 has a folding structure with a hinge at the center and covers an opening on the upper surface of the washing machine main body 7. The lid detecting switch 8 is provided with a bearing 6 of the washing tub lid 6.
A contact is opened / closed in response to opening / closing of the washing tub lid 6 by a lever 6b provided near a. Control device 9
Is disposed on the operation display section 10 on the upper front surface of the washing machine main body 7 so as to sequentially control a series of steps of washing, rinsing, and dehydrating.

[0006] As shown in FIG.
When the washing tub lid 6 is closed, the switch lever 80 is pushed up in the direction of arrow A by the lever 6b to close the contacts 82a and 82b via the movable body 81. Also,
The lever 83 is pushed in the direction B when the washing and dewatering tub 1 vibrates greatly during the spin-drying operation, so that the contacts 82 a and 82 b closed by the switch lever 80 push the movable body 81 to open.

In the above configuration, when the setting of the dehydration operation is input to the control device 9 by the user, or when the dehydration process starts in a fully automatic operation, the control device 9 drives the drain valve 5 and the motor 4 to decelerate. The washing and dewatering tub 1 is rotationally driven via the mechanism 3. When the user opens the washing tub lid 6 during this spin-drying operation, the contacts 82a and 82b of the lid detection switch 8, which have been pressed and closed by the lever 6b, open, and a signal to open the lid is input to the control device 9, and the control device 9 stops the rotation of the motor 4 and stops the driving of the drain valve 5. When the drive of the drain valve 5 is stopped, the brake mechanism in the speed reduction mechanism 3 operates to decelerate and stop the washing and dewatering tub 1.

Also, if the clothes in the washing and dewatering tub 1 are biased during such a dehydrating operation, the washing and dewatering tub 1 will swing right and left, and the washing machine body 7 will vibrate. At this time, due to the vibration of the washing and dewatering tub 1, the lever 83 of the lid detection switch 8 is pressed, and a pulse signal of Pw = about 50 to 200 msec is output from the contacts 82a and 82b as shown in FIG. Input to the device 9. Control device 9
Detects the imbalance during the dehydration operation based on this signal, stops the dehydration operation, supplies water to the washing and dehydration tub 1, stirs the clothes with the stirring blades 2, corrects the bias, and then drains again to dehydrate. continue.

[0009]

In such a conventional washing machine, the contact 8 of the lid detection switch 8 when the washing tub lid 6 is closed is provided.
2a and 82b, the contact pressure at the time of ON, the lever 83
It is necessary to satisfy a plurality of factors, such as the detection sensitivity at the time of dehydration unbalance, and the lever 6b for driving the lid detection switch 8 may be close to the bearing 6b of the washing tub lid 6,
When the contacts 82a, 82b are opened, the angle of the washing tub lid 6 is 10
Degree. At this time, the washing tub lid 6 and the operation display unit 10
The distance between the washing and dewatering tub 1 was about 5 cm, and in some cases, a finger or the like touched the rotating washing and spin-drying tub 1 and there was a risk of injuries.

In addition, the user touches the washing tub lid carelessly.
For example, the lid is opened slightly, and the lid detection switch 8 is temporarily
Off, and unbalance may be detected by mistake.
Was. The present invention solves this problem, and the operation of the user
The first objective is to prevent erroneous detection of abnormal vibration due to
are doing.

Further, the sense of unbalance detection during the dehydration operation
Degree of opening detection angle of washing tub lid while satisfying conditions such as degree
Lower the washing tub lid slightly
To stop the washing and dewatering tub to further improve safety
It has a second purpose.

[0012]

SUMMARY OF THE INVENTION In order to achieve the first object, the present invention provides a control means for controlling a series of steps of washing, rinsing and dehydrating, and a printing device arranged on a top surface of a main body of a washing machine. A first lid detecting means mounted on the wiring board and responsive to a magnet mounted on the washing tub lid, and a second lid detecting means which is turned on when the washing tub lid is closed and turned off when the washing and dewatering tub is abnormally vibrated;
Lid detecting means, wherein the control means includes a first lid detecting means.
Means are turned on, and the second lid detection means is equal to or less than a predetermined time
Abnormal vibration of washing and dewatering tub when temporarily turning off
The first problem solving means is that it is determined that the task is performed.

Further, in order to achieve a second object, the control means of the first means for solving the above problems comprises the first lid detecting means.
If either the step or the second lid detecting means is turned off
The second problem solving means is that it is determined that the lid of the washing tub is open .

[0014]

According to the first aspect of the present invention, there is provided:
The first lid detecting means is turned on, and the second lid detecting means is
Washing and dewatering when temporary off operation for a fixed time or less
Judge that the tank is vibrating abnormally and imbalance during dehydration
For example, the user carelessly opens the washing tub lid
By touching, etc., accidentally detecting imbalance during dehydration
No more.

Further, according to the second means for solving the problems, the first
Distance adjusted by the sensitivity of the lid detection means and the strength of the magnet
Can set the detection angle when the washing tub lid is opened.
Therefore, the opening detection angle of the washing tub lid can be lowered.
You. In addition, the first lid detecting means or the second lid detecting means
It is safe to judge that the lid is open just by turning off one of them
Properties can be further improved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS. The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 1, a control means 11 controls a motor 4, a drain valve 5, a water supply valve 13 and the like via a power switching means 12 constituted by a bidirectional thyristor or the like, and , Rinsing and dehydration are controlled. The operation display means 14 is for inputting operation settings such as washing, rinsing, and dehydration, and for displaying an operation state. The water level detection means 15 detects the water level in the washing and dewatering tub 1 and inputs its output to the control means 11 so that water can be supplied to a predetermined water level.

Reed switch (first lid detecting means) 16
Is mounted on the printed wiring board 18 of the control device 17 disposed on the upper surface of the washing machine main body 7, and turns on when the magnet 19 attached to the tip of the washing tub lid 6 approaches, and turns off when away. I do. Lid detection switch (second lid detecting means) 8
Turns on when the washing tub lid 6 is closed, and turns off when the washing and dewatering tub 1 is vibrated abnormally.

As described above, the control means 11 controls a series of steps of washing, rinsing, and dehydrating. Further, when either the reed switch 16 or the lid detecting switch 8 is turned off, the washing tub lid 6 is turned off. It is determined that it is open. When the reed switch 16 is turned on and the lid detection switch 8 is temporarily turned off for a predetermined time or less, it is determined that the washing and dewatering tub 1 is abnormally vibrating.

As shown in FIG. 3, the control device 17 comprises a microcomputer (not shown) constituting the control means 11, a display light emitting diode 20 constituting the operation display means 14, and a switch on a printed wiring board 18. 21, a resistor 23, a capacitor 23 and a reed switch 16 are mounted.
And are located opposite to each other. FIG. 4 is a structural view of the reed switch 16, in which a glass tube reed switch body 25 is fitted in a resin case 24. FIG.

The operation of the above configuration will be described. When the setting of the spin-drying operation is input from the switch 21 of the operation display means 14 or the spin-drying operation is started in the fully automatic operation, the control means 11 controls the power switching means 12 through the power switching means 12. Then, the drain valve 5 and the motor 4 are driven, and the washing and dewatering tub 1 is rotated via the speed reduction mechanism 3. At this time, since the washing tub lid 6 is closed, the lid detection switch 8 and the reed switch 16 are on.

When the user opens the washing tub lid 6 during this spin-drying operation, first, as shown in FIG.
6 is turned off, and then, as shown in FIG. 5B, the lid detection switch 8 is turned off. The control means 11 determines that the washing tub lid 6 is open at the point C in FIG. 5 and stops the rotation of the motor 4 and stops the driving of the drain valve 5. Drain valve 5
Is stopped, the brake mechanism in the speed reduction mechanism 3 operates, and the washing and dewatering tub 1 is decelerated and stopped.

At this time, the distance between the magnet 19 where the reed switch 16 is turned on and the reed switch 16 and the distance where the reed switch 16 is turned off can be determined by the sensitivity value, the open value of the reed switch 16 and the magnetic flux density of the magnet 19. Yes, for example,
The ON distance can be set to 10 mm and the OFF distance can be set to 30 mm.

Next, when the clothes in the washing and dewatering tub 1 are biased during the dehydrating operation, the reed switch 16 is turned on and the vibration of the washing and dewatering tub 1 is turned on as shown in FIG. Accordingly, as shown in FIG. 6B, only the lid detection switch 8 is turned off by about Pw = 50 to 200 ms. Control means 11
Is determined to be dehydration imbalance only under these conditions,
After the dehydration operation is stopped and the washing and dewatering tub 1 is supplied with water, the clothes are agitated by the agitating blades 2 to correct the unevenness, then drained again to continue dehydration.

In the above embodiment, the first lid detecting means is constituted by the reed switch 16, but it is sufficient that the first lid detecting means is responsive to a magnet mounted on the washing tub lid 6, such as a Hall element. Not even.

[0026]

As is apparent from the above embodiments, according to the present invention, control means for controlling a series of steps of washing, rinsing, and dehydrating, and a printed wiring board provided on the upper surface of the main body of the washing machine are provided. A first lid detecting means which is mounted and responsive to a magnet mounted on the washing tub lid, and a second lid detecting means which is turned on when the washing tub lid is closed and turned off when the washing and dehydrating tub is abnormally vibrated. The control means is such that the first lid detection means is off;
And the second lid detecting means is temporarily
The washing and dewatering tub is abnormally vibrating when it is turned off
Is determined, for example, the user is careless
Touching the washing tub lid, etc.
This eliminates the possibility of detecting a sense.

Further, the control means includes the first lid detecting means.
Or when one of the second lid detecting means is turned off
Then, it was decided that the washing tub lid was open,
The opening detection angle of the washing tub lid can be reduced,
Safety during operation of the machine can be further improved, and the first lid
The detection means is mounted on the printed wiring board of the control device.
Therefore, wiring and connection from the first lid detection means to the control means
No need for a connector, etc.
Countermeasures can be reduced. Also, the first lid detecting hand
Only one of the step and the second lid detecting means is turned off
Thus, the safety can be further improved because the lid is determined to be open.

[Brief description of the drawings]

FIG. 1 is a block diagram of a washing machine according to an embodiment of the present invention.

FIG. 2 is a sectional view of the washing machine.

FIG. 3 is a perspective view of a control device of the washing machine.

FIG. 4 is a sectional view of a reed switch of the washing machine.

FIGS. 5A and 5B are time charts of signals when a washing tub lid of the washing machine is opened.

FIGS. 6A and 6B are time charts of signals when the washing machine is dehydrated and unbalanced.

FIG. 7 is a sectional view of a conventional washing machine.

FIG. 8 is a sectional view of a lid detection switch of the washing machine.

FIG. 9 is a time chart of signals at the time of dehydration imbalance of the washing machine.

[Description of Signs] 6 Washing tub lid 7 Washing machine main body 8 Lid detection switch (second lid detecting means) 11 Control means 16 Reed switch (first lid detecting means) 18 Printed wiring board 19 Magnet

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shigeru Matsuo 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (56) References JP-A-60-179092 (JP, A) JP-A-3-3 141995 (JP, A) Japanese Utility Model 4-10885 (JP, U) Japanese Utility Model Utility Model 57-90064 (JP, U) Japanese Utility Model Utility Model 52-103772 (JP, U) Japanese Utility Model Utility Model 53-131668 (JP, U) Patent 2778757 (JP, B2) JP 7-7898 (JP, Y2) (58) Fields investigated (Int. Cl. ⁷ , DB name) D06F 37/42

Claims (2)

(57) [Claims] 1. A control means for controlling a series of steps of washing, rinsing and dehydration, and a first means responsive to a magnet mounted on a printed wiring board disposed on an upper surface portion of a washing machine main body and mounted on a washing tub lid. And a second lid detecting means which is turned on when the washing tub lid is closed and which is turned off when the washing and dewatering tub is abnormally vibrated. The control means is such that the first lid detecting means is off.
And the second lid detecting means is temporarily
The washing and dewatering tub is abnormally vibrating when it is turned off
A washing machine that is determined to be . 2. The control means according to claim 1, wherein said first lid detection means and
When one of the second lid detecting means is turned off,
The washing machine according to claim 1, wherein it is determined that the washing tub lid is open .